JP2873480B2 - Auxiliary contact lenses for inspection and surgery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to observing a fundus through a slit microscope, or irradiating a desired portion of the fundus with a light beam for coagulation while performing such observation. The present invention relates to an auxiliary contact lens for examination and surgery that can be used together with a device for performing coagulation surgery.

[Conventional technology]

When performing a fundus examination of the eye, anesthesia is first performed. next,
A few drops of a drug are inserted into one end face of the auxiliary contact lens for inspection and surgery, and the end face is brought into close contact with the affected eye. Subsequently, the inside of the eyeball of the diseased eye is observed via a slit microscope from an end surface of the contact lens that is different from the end surface and that faces the examiner.

At that time, when losing the power (magnification) of the cornea of the patient to which the contact lens is worn, fixing the diseased eye, and observing the inside of the eyeball through a three-sided mirror inside the contact lens, A wide angle of view is required.

[Problem to be Solved by the Invention] However, since the corneal contact portion of the conventional auxiliary contact lens for inspection and surgery is fixed to a shape corresponding to a standard radius of curvature of the corneal surface, it is manufactured by the following method. In the individual contact lenses for examination and surgery, the radii of curvature of the corneal surface of various patients and the curvature radii of the contact lenses are greatly different, and air bubbles are generated between the surface portion of the cornea and the area where the contact lenses for examination and surgery should be in close contact. However, there are problems that the patient's contact surface of the contact lens is hard and the affected eye receives a feeling of pressure.

In order to solve this problem, an auxiliary contact lens for inspection and surgery having a different radius of curvature according to the difference in the radius of curvature of the corneal contact portion is required. Therefore, when examining or operating a large number of patients, it is necessary to prepare several types of auxiliary contact lenses for examination / operation close to the radius of curvature of the corneal surface of each patient.

The present invention has been made in order to solve the above-mentioned problems, and is intended to make it possible to match various radii of curvature of a corneal surface with a single examination / surgical auxiliary contact lens. An object of the present invention is to provide an auxiliary contact lens for inspection and surgery that can be used without causing any trouble.

[Means for solving the problem]

Means for Solving the Problems To achieve the above object, an auxiliary contact lens for examination and surgery according to the present invention has a lens barrel having a first surface facing the examiner and a second surface that is brought into close contact with the cornea of the affected eye. An auxiliary contact lens for inspection and surgery capable of observing the inside of an affected eye through the second surface from the first surface, wherein the first surface is formed of a translucent member, The second surface is formed of a flexible light-transmitting film member so that the light-transmitting film member assumes the shape of the cornea of the affected eye.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 includes a lens barrel limited by a first plane P and a second plane Q, from the first plane P facing the examiner (not shown) on the left side in the figure. An auxiliary examination / surgical contact lens 1 with a trihedron for observing the inside of the affected eye through the second surface Q, which is brought into close contact with the cornea (not shown) of the right affected eye as viewed in the drawing, is shown. Have been.

The contact lens 1 is a flat, non-attenuating laser beam that forms the first surface P on the examiner side, for example, a circular light-transmitting member 2 that is a glass plate, and a second lens that is brought into close contact with the cornea of the affected eye. For example, a soft plastic film circular light-transmitting film member 3 that forms a surface Q
including. The translucent member 2 is arranged perpendicular to the optical axis O, and is fixed to the inner wall of the lens barrel 5 so as to close the left opening of the lens barrel 5.

The translucent member 2 is connected to the cylindrical inner wall of the lens barrel 5 via an annular elastic member 4 fixed to the peripheral edge of the back surface. The translucent film member 3 is disposed at the right end opening of the lens barrel 5. Although the light transmitting film member 3 is shown in a plan view in FIG. 1, it is actually curved so as to assume the shape of the cornea of the diseased eye to be adhered as shown in FIG. It is made to form a surface.

A cavity is formed by the circular translucent plate member 2, the circular translucent film member 3, the annular elastic film member 4, and the inner wall of the lens barrel 5, and the cavity is filled with a liquid 6 that transmits laser light. Is done. The liquid 6 is interchangeable and may be a gas. Further, the circular translucent member 2, the annular elastic film member 4, and the cylindrical inner wall at the left end of the lens barrel 5 have an annular air chamber having an air flow opening 7 a at the peripheral edge of the translucent member 2. 7 is formed. Further, on the inner wall of the lens barrel 5, three-sided mirrors, that is, total reflection mirrors 8, 9 and 10 are obliquely provided with respect to the translucent plate member 2 so as to form an inclination angle described later.

Next, a case where the contact lens of this embodiment is worn on the affected eye will be described with reference to FIG. The light emitted from the fundus rim M of the diseased eye E passes through the center of the crystalline lens G of the diseased eye E, is reflected by the total reflection surface mirror 8, and becomes a flat light-transmitting member 2.
Incident on. Therefore, the examiner can observe the illuminated image of the fundus rim M through a slit microscope (not shown) disposed behind the translucent member 2.

Further, a fundus image observed by a contact lens mounted on the affected eye will be described with reference to FIG.
In FIG. 3, three areas A, B and C reflected on the surface of the circular translucent member 2 surrounded by the annular end of the lens barrel 5 are shown.
Shows images of the above-mentioned total reflection surface mirrors 8, 9, and 10 formed by the liquid 6. The total reflection mirrors 8, 9 and 10 form an inclination angle of 73 °, 67 ° and 59 ° with respect to the flat translucent member 2, respectively. The total reflection mirrors 8, 9, and 10 are used for observing the equator of the fundus, the extreme peripheral and serrated edges of the fundus, and the corner of the anterior chamber of the fundus.

The circular area D centered on the optical axis O is
In this case, the examiner can visually recognize the rear pole portion located at the center of the fundus in the area D by looking into the contact lens in the direction of the optical axis O.

Next, with reference to FIG. 2, an operation performed by the contact lens of the embodiment when the contact lens is attached to the affected eye will be described.

When the contact lens 1 is brought into contact with the cornea K of the eye E, the liquid 6 filled in the lens barrel 5 receives a leftward pressure in FIG. Therefore, the elastic membrane member 4 absorbs the energy of the force exerted by the cornea K by bending as shown in the drawing due to this pressure. At that time, the volume of the air chamber 7 is reduced, and excess air is discharged through the air circulation port 7a.

At the same time, the liquid 6 exerts a rightward pressure on the cornea K via the translucent member as a reaction of the force exerted on the liquid 6 by the cornea K. As described above, since the light-transmitting film member 3 is made of a flexible material, the light-transmitting film member 3 is brought into close contact with the cornea K in the shape of the cornea K of the diseased eye E. The rightward pressure exerted by the liquid 6 comes into equilibrium with the leftward force exerted by the cornea K via the transparent membrane member 3.

As described above, after the contact lens 1 is brought into close contact with the affected eye E, the energy of the force that the cornea K of the affected eye E exerts on the transparent membrane member 3 is absorbed by the elastic membrane member 4 being bent, and the effect of the cornea K is exerted. Since the force balances with the force exerted by the liquid 6 through the transparent membrane member 3 which adheres to the shape of the shape, the cornea K exerts a uniform weak pressure over the whole in this equilibrium state. Therefore, the affected eye E does not feel any oppression.

As mentioned above, although one Example of this invention was described in full detail, this invention is not limited to this. For example, the fluid inserted into the lens barrel 5 is not limited to a liquid but may be a gas, for example. Any substance that can quickly transmit the pressure of the affected eye E and can transmit light can be used in the same manner as the fluid.

〔The invention's effect〕

According to the present invention, since the corneal contact portion of the auxiliary contact lens for inspection and surgery is formed of a flexible translucent film member, one contact lens can be made to conform to the corneal shape of various affected eyes. Can be. In addition, when the contact lens is attached to the affected eye, the affected eye E does not receive a feeling of oppression, so that the examination and the operation can be performed with confidence. Further, since the light-transmissive film member and the liquid filled therein can be exchanged, there is an effect that the member can be kept clean during mounting.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of an auxiliary contact lens for inspection and surgery having a three-sided mirror according to an embodiment of the present invention, and FIG. 2 is a state in which the auxiliary contact lens for inspection and surgery shown in FIG. FIG. 3 is a rear view of the auxiliary contact lens for inspection and surgery shown in FIG. DESCRIPTION OF SYMBOLS 1 ... Contact lens 2 ... Translucent member 3 ... Translucent membrane member 4 ... Elastic membrane member 5 ... Barrel, 6 ... Liquid 7 ... Air chamber, 7a ... Air flow port 8 ... Total reflection mirror 9 Total reflection mirror 10 Total reflection mirror

Claims (1)

(57) [Claims] 1. A lens barrel having a first surface facing an examiner and a second surface brought into close contact with a cornea of an affected eye, wherein the lens barrel of the affected eye passes through the second surface from the first surface. In the auxiliary contact lens for inspection and surgery capable of observing the inside, the first surface is formed of a light transmitting member, and the second surface is formed of a flexible light transmitting film member. An auxiliary contact lens for examination and surgery, characterized in that the membrane member conforms to the shape of the cornea of the affected eye.